#include<stdio.h>
void f1(int *x);
int main()
{
	int a[10]={1,2,3,4,5,6,7,8,9,10};
	f1(a);
	printf("a:%d\n",a[3]);
}
void f1(int *x)
{
	printf("x:%d\n",x[3]);
	scanf("%d",&x[3]);
	printf("x:%d\n",x[3]);
}
